The DVP-120M exhaust fan controller provides automatic control to help maintain an acceptable environment in parking garages or other facilities. The DVP-120M system is designed to meet specifications for safety in enclosed parking garages, including the Uniform Building Code and OSHA 50ppm CO requirements. Using the Macurco MRS-485 Modbus adapter and 6-Series detectors, the DVP-120M can control up to 87 addressable gas detectors.
Gas detection and exhaust fan control is provided by a Macurco DVP-120M system. System wiring includes main power connection for the DVP-120M, 4-20mA current loop, RS-485 serial interface and 24VDC power connections between the remote detectors and the DVP-120M, the fan control and alarm connections from the DVP-120M to the building ventilation and automation systems. The DVP-120M control panel has three relays which can be used for ventilation fan control or alarm signaling. The ventilation control function operates independently from the alarm function. It provides the ability to configure the DVP-120M for control of one to three zones. Each zone can respond to gas levels at one or more of the sensors, with configurable rising and falling concentrations for each gas type. Each zone can also be controlled based on the time of day.